During April 2025, the developer focused on backend reliability for the OpenListTeam/OpenList repository, addressing a critical issue in Mega cloud storage integration. They resolved a bug where files with duplicate names caused the oldest version to be listed and downloaded, leading to user confusion and data inconsistencies. By implementing logic in Go to filter out older file versions and ensure only the newest is selected during CRUD operations, they improved data integrity and reduced support incidents related to version conflicts. Their work demonstrated depth in backend development and cloud storage integration, with careful validation to maintain regression safety and system stability.